That's how it was described to me once.
When I asked an electrician I knew to explain to me why electricity didn't fall out of the outlets if there wasn't a plug to stop it, he gave me some story about how electrity flows like water. Well, now, according to <a target="_blank" href="http://news.bbc.co.uk/1/hi/technology/3201030.stm">this article on the BBC</a>, electricity may flow <i>from</i> water. It's not hydro-electric power plants, but it is electricity generated from the flow of water. Fascinating and new, so no one knows what the implications are yet. Perfect fodder for a near-future science-fiction story!
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